20201124020491 has 2 divisors, whose sum is σ = 20201124020492. Its totient is φ = 20201124020490.

The previous prime is 20201124020423. The next prime is 20201124020551. The reversal of 20201124020491 is 19402042110202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201124020491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201124030491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100562010245 + 10100562010246.

It is an arithmetic number, because the mean of its divisors is an integer number (10100562010246).

Almost surely, 2^{20201124020491} is an apocalyptic number.

20201124020491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201124020491 is an equidigital number, since it uses as much as digits as its factorization.

20201124020491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 20201124020491 its reverse (19402042110202), we get a palindrome (39603166130693).

The spelling of 20201124020491 in words is "twenty trillion, two hundred one billion, one hundred twenty-four million, twenty thousand, four hundred ninety-one".